Answer: A form of oppression
Explanation: The Communists based their claims on the fact that they created a so-called just society in which they are all equal. Such a equal society and government that implements the conditions for such a society is based on the idea of a world revolution where there will be no capitalism and a difference to social classes, that is, it will not be a class at all. In fact there is only one class of workers and in this way they are all equal. In addition, one should take into account that in such a utopian society, all those who are not like-minded are persecuted, killed, and the intellectual elites exterminated.
That is why all those living in democratic societies, including the Americans, consider that such social conditions are nothing more than oppression of freedom of speech, religion, property right, etc.